Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue:
Total revenue	$ 30,552	$ 24,933
Operating costs and expenses:
Cost, Product and Service [Extensible Enumeration]	Product Sales [Member]	Product Sales [Member]
Product costs	$ 8,803	$ 5,267
Research and development	8,664	12,743
Selling, general and administrative	12,537	13,236
Acquired intangible asset amortization	870	913
Contingent consideration expense		3
Total operating costs and expenses	30,874	32,162
Operating loss	(322)	(7,229)
Other expense:
Interest expense, net	(896)	(826)
Foreign exchange loss	(45)	(125)
Investment income, net	539	172
Other expense, net	(402)	(779)
Loss before income taxes	(724)	(8,008)
Income tax (expense) benefit	(62)	165
Net loss	$ (786)	$ (7,843)
Basic net loss per share	$ (0.06)	$ (0.56)
Diluted net loss per share	$ (0.06)	$ (0.56)
Weighted average number of shares outstanding:
Basic	14,102	13,983
Diluted	14,102	13,983
Product Sales [Member]
Revenue:
Total revenue	$ 18,827	$ 14,234
Royalties and License Fees [Member]
Revenue:
Total revenue	9,179	8,765
Research, Development and Other [Member]
Revenue:
Total revenue	$ 2,546	$ 1,934